Mechanism and method for forming sleeved valve bags



June 30, 1953 E. E. BuRRouGHs MECHANISM AND METHOD FOR FORMING SLEEVED'V'ALVE BAGS Filed sept. 29. 1949 18 Shets-Sheet l lilo hn(ullm INVENTOR.

EDWIN JBURROUGHS 5 A TORNEVS.

June 30, 1953 E. E. BuRRoUGl-ls MECHANISM AND METHOD FOR F'ORMING SLEEVED VALVE BAGS Filed Sept. 29, 1949 18 Sheets-Sheet 2 INVENTOR. EDWI N E. URROUGHS H15 ATTORNEYS.

June 30, 1953 E. E. BuRRouGHs MECHANISM AND MET-'HOD FOR FORMING SLEEVED VALVE BAGS 18 Sheets-Sheet l3 Filed Sept. 29, 1949 INVENTOR. lDwIN EBURRQUGHS.

E. E. BURROUGHS June 30, 1953 MECHANISM AND METHOD FOR FORMING SLEEVED VALVE BAGS 18 Smets-Sheet 4 Filed Sept. 29, 1949 INVENTOR. EDWIN E. BURROUGHS. 4am/0.5 IM

June 30, 1953 E. E. BuRRoUGl-xs 2,643,588

MECHANISM AND METHOD FOR FORMING sLEEvED VALVE BAGS Filed sept. 29, 1949 l 18 sheets-sheet 5 INVENTOR. EDWIN E BURROUGHS.

18 Sheets-Sheet 6 E. E. BURROUGHS June 30, 1953 MECHANISM AND METHOD FOR F'ORMING SLEEVED VALVE BAGS Filed Sept. 29. 1949 INVENTOR.

l5' A TURA/EVS.

a H G U o R R U B E m w ZbW/M2M Q T J June'30, 1953 MECHANISM AND E. E. BURROUGHS METHOD FOR FORMING SLEEVED VALVE BAGS 18 Sheets-Sheet '7 h'lj ATTORNEYS.

June 30, 1953 E: E. BURRouGHs 2,543,583

MECHANISM AND METHOD FOR FORMING sLEEvED VALVE BAGS Filed sept. 1949 18 Sheets-Sheet 8 I 114k f lI 114m Ilia. 112 1124 I i i 188 Ii l: v. rv vm 1 h fl 12am j m 16)() H/.5` ATTORNEYS.

June 30, 1953 E. E. BuRRoUGn-ls 2,643,588

MECHANISM AND METHOD FOR FORMING SLEEVED. VALVE BAGS Filea Sepg. 29, 1949 18 Sheets- Sheet 9 INVENTOR. EowlN E. BURRQUGHS.

Maw@ IM June 30, l1953 E. E. BURRouGl-is 2,643,588

MECHANISM AND METHOD FOR FORMING SLEEVED VALVE BAGS Filed sept. 29. 1949 18 sheets-sheet 1o EDWIN E. BURROUGHS.

BY 4am/M IM H/. ATTORNEYS.

`June 30, 1953 E. E. BuRRucaHs 2,643,588

MECHANISM AND METHODFOR FORMING SLEEVED VALVE BAGS Filed Sept, 29, 1949 18 Sheets-Sheet 11 IN VEN TOR.

Eowm E. URROUGHS. BY

//S ATTORNEYS.

June 30, 1953 E. E. BuRRoUGHs 2,643,588

MECHANISM AND METHOD FOR F'ORMING SLEEVED VALVE BAGSA Filed Sept. 29, 1949 18 Sheets-Sheet l2 HIJ A TTORNEYJ.

June 30, 1953 E; E, BURRQUGHS 2,643,588

MECHANISM AND METHOD FOR FORMING SLEEVED' VALVE BAGS Filed Sept. 29, 1949 18 Sheets-Sheet 13 IN VEN TOR.

EDWIN E BumzouaHs.

H15 ATTORNEYS.

18 Sheets-Sheet 14 E. E. BURRUGHS INyENToR. Enwm [.BUEROUGHS. BY

MECHANISM AND METHOD FOR F'ORMING SLEEVED VALVE BAGS June 30, 1953 Filed sept. 29. 1949 June 30, 1953 E. EBURRQUGHS 2,643,538

MECHANISM AND METHOD FORr FORMING sLEEvEn VALVE BAGS med sept. 29, 1949 18 sheets-sheet 15 INVENTOR. EDWINEBURROUGHS. BY

H/S TTORNEKS.

June 30, 1953 E. E. BuRRoUGl-ls 2,643,588

MECHANISM AND METHOD FOR FORMINGKSLEEVED VALVE BAGS Filed Sept. 29, 1949 18 Sheets-Sheet 16 INVENTOR. EDWIN E vuRRouGHs,

@IMPM H15 A T TORNEKS.

June 30, 1953 E. E. BURRoUGHs 2,643,588 MECHANISM AND METHOD FOR FORMING SLEEVED VALVE BAGS Filed Sept. 29, 1949 18 Sheets-Sheet 17 41m/MPM Jue 30, 1953 E. E. BuRRouGHs 2,643,588

MECHANISM AND METHOD FOR FORMING SLEEVED VALVE BAGS Filed Sept. 29, 1949 18 Sheets-Sheet 18 INVENTOR. EDWIN E. BuRRouGHs MM 2M Patented June 30, 1953 MEOHANISM AND METHOD Foa FOR'MING sLEEvED VALVE mdsV Edwin E. Burroughs, Brooklyn, N. Y., as'signor to u St. Regis Paper Company, New York, N. Y., a corporation of New York 'Application September 29, 1949, Serial No. 118,545

27 Claims. (Cl. S13- 8) This invention relates to apparatus for manu- Y facturing valve bags of paper or other thin sheet material, and more particularly relates to a machine for shaping or forming the corners of flattened bag tubes for the formation of valves therein and, if desired, for substantially concurrently forming and securing in place in the valve corners supplemental sheets adapted to form closure sleeves or valve extension closure flaps for the valves in the finished bags. The machine of the invention is adapted for association with sewing apparatus for forming sewn seams across the ends of the bag tubes to close same shortly after the valves and sleeves have been formed with the supplemental sheets therein. y

Heretofore, generally it has been the practice to shape the valve parts of bag tubes of the charw acter above set forth by the use of suitable devic-es or machines, and if the valve is to have a supplemental sheet to form a sleeve or iiap extension, such sheet has been inserted manually. llhis, of course, has been an expensive operation requiring large numbers of workers trained to handle rapidly the usually large and cumbersome bags so as to be able quickly to open the valved other operations performed automatically in the production of such bags.

So far as is known, no practical or suitable automatic machinery for performing such sleeving operations has been suggested or gone into use. In those cases where the bag tube has a valve formed therein prior to the application of a supplemental sheet, the proper and accurate insertion of the latter by automatic means in folded condition with a portion glued upon or under one or more of the plies of the valve flap, has involved serious dimculties.

Apparatus of this character heretofore suggested has failed to position accurately and prepare a bag tube valve corner for the insertion of a supplemental sheet. This has resulted in a high percentage of rejected bags, for example, because the supplemental sheet has been positioned off center relative to a valve flap of such corner.

In accordance with the present invention, a machine is provided which overcomes the above noted difficulties and performs the function of` valving the bag tube or shaping the valve therein substantially concurrently with the steps of applying, folding and securing in place the supplemental sheet. The machine preferably is equipped with mechanism for substantially concurrently cutting and otherwise preparing the supplemental sheets from a continuous band of paper or other sheet material from which they are formed. l

The operations of opening the mouth of the bag tube at the valve corner thereof, whereby a valve flap is formedfolding in the corner or valve flap to form a valve, the insertion and shaping of the supplemental sheet therein, followed by th-e closing or flattening of the corner, necessarily involve a succession of abrupt and relatively complicated movements of the machine parts. In order to perform this succession of operations at a rate of speed accurately andwithout undue pounding or vibration of Inachine parts, or injury to the bag, the various necessary steps are, in accordance with the preferred form of the invention, performed in rapid succession with the bag tube positioned at successive closely spaced stations.

In order to feed the bags, which may be of different sizes and types, to the rst of these stations and accurately position same with proper timing, a feeding mechanism is provided which is adjustable for various sizes of bags. The timing of the feeding mechanism is adjustable with respect to the valving and sleeving mechanism so that each bag tube corner which is to be valved will arrive at the proper station at the proper time regardless of the dimensions of the bag tube.`

At the outlet side of the machine a novel arrangement of conveying equipment preferably is provided for carrying the bags, after the valving and sleeving, to automatic sewing equipment so arranged as to close one or both ends of the bag with sewn` seams as rapidly as they are supplied from the valving and sleeving machine.

Various other objects, features and advantages of the invention will clearly appear from the detailed description given below taken in connection with the accompanying drawings which form a part of the specification and illustrate by way of example one form of apparatus which may be used in carrying out the invention. The invention resides in such novel features, arrangements and combinations of parts and method steps as may be shown and described in connection with the apparatus herein disclosed.

This application is a continuation-in-part of my co-pending application, Serial No. 667,184, filed May 3, 1946, for mechanism and means for forming sleeved valved bags (now abandoned).

In the'dravlings:

Fig. i is a perspective view of a portion of a tube undergoing one of the initial operations in the formation of a bag valve, namely, the bias scoring or" the valve corner of such tube;

Fig. 2 is a perspective view oi` a gusseted bag tube portion having the g-usset thereof spread by a gusset wedge preparatory to the insertion of a spreader device;

Fig. 3 is a perspective view of a bag tube portion in station No. 1 after being engaged by a bagtube carrier including a clampingmecha,- nism (pair of ily sticks) and after a valve corner spreader (butterfly) thereof preparatory to spreading's'ame;

Fig. 4 is a perspective view of such bag tube portion in station No. 2 wherein thetube end or valve corner is spaced by a spreading of the elements of the corner spreader, that is, thespreading of the wings `of the butteriiy; Y

Fig. 4a is a plan view of therparts shown in Fig. 4 with the addition of a supplementary tube end spreader elementl known as :an umbrella element;

Fig. 5 is a perspective view of theY bag tube end spread under the combined influence of the spread butterfly and the spreadrumbrella element;

Fig. 5a is a plan viewY partly in section of the parts shown in Fig. 5;

Fig. 5b is a side `elevation showing the several positions of the umbrella element and a valve flap press ram relative to the spread bag tube end;

Fig. 5c is a plan View of the'parts shown in Fig. 5b;

Fig. 5d is an end view of the parts shown in Fig. 5b;

Fig. 5e is a sectional view taken substantially along line 5e-5e of Fig. 5d;

Fig. 6 is a perspective view` similary to Fig. 5 showing in addition thevalve flap press ram which presses a base portionof the valve nap;

Fig. 6u is a plan view of the'parts shownin Fig. 6;

Fig. 7 is a perspective view of the spread tube end in station No. 3 including portions of a supplementary sheet applying device including a reciprocating ram having such a sheet gripped thereby in position just prior to application to the tube;

Fig. 7a is a plan view of another type of supplementary sheet which may be applied by the apparatus embodying the invention;

Fig. 8 shows the parts shown in Fig. 7 in-a subsequent operating poosition wherein the supplementary sheet is applied to form a tuck-in type sleeve;

Fig. 9 illustrates in perspective the parts shown in Figs. 7 and 8 but with the sheet applying device being withdrawn away from the bag tube and in addition parts of a so-called sleeve holddown finger unit in operation for holding the sleeve in position while said device is being withdrawn;

Fig. 10 shows in perspective a tucker blade engaging the spread tube end or valve corner and supplementary sheet just prior to closing of the butterfly and to the formation of a sleeved valve;

Fig. 1l illustrates a sectional view of the valve corner when the butterfly is substantially closed and the tucker blade is tucking in the valve;

Fig. 12 is a perspective view of a fragment of the bag tube showing a sleeved valve fOlmQ. in

' accordance with the invention;

is inserted in the gussetr Fig. 13 is a plan View, with certain parts omitted for clarity, of a mechanism for conveying bag tubes to and positioning same relative to the tube carrying or clamp device which successively positions each tube at the several stations where the valve is formed and the supplementary sheet inserted;

Fig. 13a is a schematic View in side elevation of means for feeding bag tubes into the apparatus;

Fig. 13b is a schematic view also in side elevation of certain of the parts shown in Fig. 13 including an alternative type of precreasing mechanism;

Fig. 14 is a plan view of a bag tube precreasing device adapted for forming a diagonal fold line in each bag tube at the valve corner thereof;

Fig. 15 is a fragmentary view of a valve corner of a bag tube bearing a fold line formed by said precreaser device;

Fig. 16 is a fragmentary view, partly in section and with parts broken away, taken substantially along lines IG-I 6 of Fig. 14;

Fig. 17 is a fragmentary sectional view of the precreasing device taken substantially along line I'I--I'I of Fig. 14;

Fig. 18 is a side elevation of a bag tube forwarding or positioning device for urging each bag tube successively against a limit stop for aligning the tube relative to the bag tube carrier or ily sticks;

Fig. 19 is a sectional view of the parts show in Fig. 18 taken substantially along line l9--l9 thereof;

Fig. 20 is a schematic representation, with certain parts in section, of the operative interconnection between a main drive power source and certain principal parts of the apparatus;

Fig. 21 is a side elevation of the bag tube carrier, which in the form shown is a paddle-wheellike device, together with associated valve corner spreader means, which carrier is adapted -for grasping each bag tube successively and intermittently moving same to the various valving and sleeving stations; A

Fig. 22 is a side elevation of a cam for controlling the opening and closing of the tube clamping elements of the bag tube carrier;

Fig. 23 is a fragmentary sectional view taken substantially along line 23-23 of Fig. 21;

Fig. 24 is a side elevation of the parts shown Fig. 25 is a side elevation showing in detail the wedging device, illustrated in Fig. 2, for spreading thegusset of a bag tubeto facilitate the insertion therein of valve corner spreading means such as the butterfly shown in Figs. 2 and 23;

Fig. 26 is a fragmentary view of the valve corner spreading means inserted in a gusset of a bag tube;

Fig. 27 is a perspective view, partly in section and with parts broken away and also with certain parts omitted for clarity, of the mechanism for advancing the paddle-wheel-like bag tube carrier and for governing the opening and closing of the bag tube clamping elements thereon;

Fig. 28 is a perspective view, partly in section and with parts broken away and omitted for clarity, of a valve sleeve forming apparatus, portions of the mechanism for inserting the valve sleeve and also portions of the means for positioning the bag tubes in the bag lcarrier and forming the valve in such tubes;

Fig. 29 is a plan View partly in section and with parts broken away of the bag tube carrier and of portionsof a drive mechanism for con- 

